Calculate the n-day rate of change (ROC) for all periods for which there is sufficient data.

# Syntax

#### Parameters

*s*
- An series where the first element is the closing price in the last trading period,
the second term is the closing price in the previous trading period and so on.
*numberDays*
- The number of days before to which the closing price is compared.

#### Return Value

A series where the first term is the rate of change for the most recent
period, the second term is the rate of change for the previous period and so on.

# Exceptions

Exception | Description |

ArgumentException | Thrown if either parameter is strictly negative. |

# Remarks

# See Also